Improvement in machines for jointing staves



2 Sheets-Sheet 1.

E. W. GILLMAN.

MACHINE FOR JOINTING STAVES.

Patented Dec. 26,1876.

Jig-

THE GRAPHIC CO-NX.

2 Sheets-Sheet 2.

E. W. GILLMAN. MACHINE FOR JOINTING STAVES.

'Patented. Dec.26, 1876.

INVENTOB mmsss's:

ATTDBNEYS.

THE GRAPHIC CO.N.

UNITED STATES PATENT OFFICE.

EDMUND W. GILLMAN, OF LONG ISLAND CITY, NEW YORK.

IMPROVEMENT IN MACHINES FOR JOINTING STAVES.

Specification forming part of Letters Patent No. 185,676, dated December26, 1876; application filed October 23, 1876.

To all whom it may. concern Be it known that I, EDMUND W. GILLMAN, ofLong Island City, in the county of Queens and State of New York, haveinvented an improvement in Machines for Jointing Staves, of which thefollowing is a specification:

Figure l is a side elevation, in section, on line .70 m in Fig. 2. Fig.2 is a front elevation. Fig. 3 is a detail view of a part of thestavecentering apparatus. Fig. 4 is a side view of one of the rotarycutters and its casing. Fig. 5 is a top view, in part section, on line 3y in Fig. 4.

Similar letters of reference indicate corresponding parts.

My invention consists in arranging two rotary concave cutterdisks,facing each other, upon a single shaft, each disk being provided withknives arranged tangential to a circle of small diameter described fromthe center of the disk. A casing surrounds each disk, which is connectedwith an exhaust-fan for removing the shavings. It also consists inadjustable guide plates or rests, attached to the side of the casing forsupporting the stave. It further consists in a pivoted frame forcarrying the stave centering and clamping apparatus. It further consistsin a device for centering the staves, and for clamping them whilebeingjointed; and, also, in an adjusting device, by means of which theends of the staves may be narrowed more proportionately in wide stavesthan in narrower ones. It also consists in a device for inclining thestave in opposite direction to give its edges the proper bevel.

The object of the invention is to joint the edges of stavesexpeditiously and accurately, and to proportion the width of the ends ofthe staves to the width of the center.

Referring to the drawing, A A are the easings for the concave disks,which also form a support for the journal-boxes B of the shaft E. F Fare disks keyed to the shaft E, which face each other, and are concavedto correspond with the convexity of the edge of a stave of averagewidth, and are provided with cutters or knives G, which are secured tothe beveled edges of slots D, cut through the disks F F, tangential to acircle of small diameter described from the center of the disk.

The knives, when arranged in this manner, are less liable to heat andwear near the heel than those arranged in the ordinary way. The casingsA A are provided with doors G, for convenience in removing and adjustingthe knives, and also with the adjustable rests a, which project throughan opening, b, in the casings A A, and are provided with convex edges,that conform to the concavity of the cutter-disks. These rests areslotted vertically, and screws (1 pass through the slots into thecasings. The legs of the casings A A are hollow, and form passages forthe escape of the shavings to a conveyor, or to a pipe connected with anexhaust-fan. H is a frame, that is pivoted in L-shaped pieces attachedto the floor midway between the casings. A curved bar, I, is attached tothe floor at the end of the frame H, and a lockle'ver, e, pivoted to theend of the said frame, looks into a hole made in the center of thecurved bar, when it is desired to hold the frame in a vertical position.The frame H is of such height as to reach above the shaft E, andreceives a bar, J, which is pivoted to the said frame at f. Anangle-plate, g, is attached to the end of the bar J, thehorizontally-projecting portion of which is slotted to receive aneccentric, It, which is pivoted in a handle, '5, that projectshorizontally from the upper side of the frame H. A bed-piece, K, uponwhich the staves are clamped, is pivoted at each end in earsjj', the earj being a part of the angle-plate g. The pivot at the front end of thebed-piece is elongated, and an arm, 70, is attached to it, and providedwith a pin, l, that slides in an adjustably-slotted piece, L. Theslotted piece L is attached by a joint, m, to the piece a, which isslotted to receive screws 0, that attach it to the casing A. Thebed-piece K is slotted transversely in its upper surface, at its center,and near its ends, to receive elastic rubber cushion-pieces p, and isprovided with the spurs q. A clamping-lever, M, is connected with thebed-piece K by a hinge, r, at the rear end of the bedpiece, which isslotted to admit of adjusting the lever to staves of differentthickness. The front end of the lever M is formed into a handle, bywhich it is brought down upon the stave. Two arms, S, project verticallyfrom the upper side of the lever M, which are slotted at their upperends to receive a rod, t, and are bored at u to receive a rocking shaft,1:. N N and O O are slotted centeringarms, that swing on the ends of therod t. P P are eccentrics keyed to the shaft '2), and connected by rodsw to the rod t. Arms a a/ are secured to the shaft '0 near its ends, andproject equally on each side of the said shaft, and areprovided withpins 1), which engage with the slots in the centering-arms. The frontend of the shaft 0 is provided with a hand wheel, Q, by which it isturned to operate the centeringarms.

The stave to be jointed is placed on the bedpiece K, and theclamping-lever M is brought down lightly upon it. The shaft 12 isturned, which, by means of the eccentrics P, draws the rod t, and,consequently, the centering arms N and O downward. At the same time thepins b, projecting from the arms a a. cause them to converge and engagethe edges of the stave, and center it on the bed-piece. Thecentering-arms are now raised above the stave and brought together outof the way by turning the shaft 2;. The stave is securely clamped bypressing down the lever M until the spurs enter the stave. The rubberpieces 1; afford a yielding surface, which accommodates itself to theinequalities of the surface of the stave, and prevent it from rocking onthe bed-piece. The frame H is released by withdrawing the pin in thelocking-lever from the curved bar I, and the frame is moved first to oneside and then to the other, subjecting the edges of the stave to theaction of the cutters in the revolving disks. The slotted piece Linclines the stave so that it is cut at the proper bevel as it ispresented to the knives. The rests a afford support to the edges of thestave while it is being jointed.

When wide staves are jointed it is necessary to make themproportionately narrower at the ends than narrow staves, and to meetthis requirement the stave may be turned, together with the clampingdevice, on the pivot f by turning the eccentric h, thus causing theknives to cut away proportionately more from the ends than in the caseof narrower staves. The upper surface of the slotted plate in which theeccentrics h It works is graduated, so that the movement of thebed-piece may be proportioned to the width of the stave.

Having thus described myinvention, I claim as new and desire to secureby Letters Patent- 1. The combination of the concave cutterdisks F F,casings A A, and rests a, the disks being provided with tangentialknives, substantially as herein shown and described.

2. The combination of the frame H, pivoted bed-piece K, clamping-leverM, arm k, and adjustable slotted piece L, substantially as and for thepurpose herein shown and described.

3. The pivoted bar J and eccentric h, in combination with the frame Hand bed-piece K, substantially as herein shown and described.

4. The rubber cushion-pieces p, in combination with the bed-piece K,substantially as shown and described.

5. The combination of the lever M, having arms S, the rod t, slottedcentering-arms O and N, or their equivalent, shaft '1), eccentrics P P,rods to, and arms a, a, provided with the pins b, substantially asherein shown and described.

6. The combination of the locking-lever a, frame H, and curved bar I,substantially as herein shown and described.

EDMUND W. GILLMAN. Witnesses:

STEPHEN P. OHARA, HENRY SHABKEY.

